Introducing Jaron: (a few options. The point is: short, sweet, to the point)

"From Kansas City, Missouri, please welcome.. Jaron Myers"

"You may have seen some of his videos online, and he's here with us tonight, please welcome our friend, Jaron Myers"

"You know, every once in a while you meet someone who really changes your life. Someone you look up to and admire and you think 'wow, I want to be that guy'.. and if you asked Jaron, he would tell you that I am that person in his life.. please welcome our good friend, Jaron Myers!"